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• W2155137645 abstract "The wavy-walled bioreactor (WWB) possesses a novel geometry comprised of walls with sinusoidal waves that mimic baffles in an effort to promote mixing. This geometry provides a unique hydrodynamic environment suitable for the cultivation of mammalian cells and tissues and the investigation of fluid mechanical effects on cell and tissue growth and development. In the present study, mixing in WWB was characterized and compared to that in a conventional spinner flask (SF). The key parameters included in this characterization were mixing time, residence time distribution (RTD), and dissolved oxygen concentration during engineered cartilage tissue cultivation. Factors that influenced mixing in WWB included wave amplitude, agitation rate, and the ratio of the impeller diameter to the tank diameter (D/T). Data obtained from RTD and acid base neutralization studies confirmed the presence of different mixing zones in WWB. A theoretical comparison of WWB to a baffled spinner flask (BSF) using computational fluid dynamics (CFD) modeling predicted that while enhanced mixing was achieved in wavy-walled and BSF bioreactors, the shear stresses applied on tissue constructs were 15% lower in WWB. Improved mixing was achieved in WWB compared to the SF at similar D/T ratios, verified by improved oxygen transport and increased dispersion. However, for lower D/T ratios mixing in WWB was not necessarily improved. This study demonstrated the importance of characterization of mixing by showing the impact of even minor changes in bioreactor geometry and operating conditions. © 2005 Wiley Periodicals, Inc." @default.
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• W2155137645 date "2005-01-01" @default.
• W2155137645 modified "2023-09-27" @default.
• W2155137645 title "Characterization of mixing in a novel wavy-walled bioreactor for tissue engineering" @default.
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• W2155137645 doi "https://doi.org/10.1002/bit.20667" @default.
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